byMyint Lwin Thein; Nitecki, Matthew H., joint author
Chester gastropods from southern Illinois, eastern Missouri, and north-western Kentucky are described. The method used in discriminating the immature from adult individuals is explained. Fifty-three named species, 20 indetermined species and four variants are described. Four new genera are as follows: Yochelsonospira, Wellergyi, Kinkaidia, Globozyga. -- Thirty-eight new species are as follows: Bellerophon (Bellerophon) claxtonensis -- B. (B.) menardensis -- Knightites (Cymatospira) welleri --... Topics: Gastropoda, Fossil -- Illinois, Gastropoda, Fossil -- Kentucky, Paleontology -- Mississippian,...